Heading is initialism of an author whose real name is not known
Names
HeadingS. O., Mr. used in: British Library: English Short Title Catalogue - AACR2 Heading, London (United Kingdom); British Library: English Short Title Catalogue - GK Heading, London (United Kingdom)
Variant NameO., S., Mr.
S.O., Mr.
Sources
Imprint SourcesT065463: his Mr. S---- O---- his last speech in P------t, 1719